Definition: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Input: Question: If a certain sample of data has a mean of 15 and a standard deviation of 2, which of the following is not within 2 standard deviations?

 Option A: 11

 Option B: 15

 Option C: 10

 Option D: 12

 Option E: 14

Option C